I think the simple explanation is that if there is continuation some endings just wouldn't get to move forward. Suicide and V in cyberspace with Alt feel like dead ends.
It's possible that Arasaka keeps V's body connected to Soulkiller (or keep it in stasis) while they are in Mikoshi. MBE breaks through the stations ICE, whisks V out and into their body again, guides them to a pod, and brings them down to earth. I'm framing this in the situation where V is still faced with the fact they might be dead by winter.
I guess the question is why MBE would still be interested in a Mercenary who sold out and amounted to nothing. Wouldn't he be more interested in someone who stormed Arasaka:
- Solo
- With the Afterlife Mercenaries
- With the Nomads
I guess he killed Adam Smasher so that counts for something.